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GB769430A - Improvements in couplings for lagging irons in mines - Google Patents

Improvements in couplings for lagging irons in mines

Info

Publication number
GB769430A
GB769430A GB26944/53A GB2694453A GB769430A GB 769430 A GB769430 A GB 769430A GB 26944/53 A GB26944/53 A GB 26944/53A GB 2694453 A GB2694453 A GB 2694453A GB 769430 A GB769430 A GB 769430A
Authority
GB
United Kingdom
Prior art keywords
locking member
tongue
ribs
rib
fork
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26944/53A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB769430A publication Critical patent/GB769430A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
GB26944/53A 1952-10-01 1953-10-01 Improvements in couplings for lagging irons in mines Expired GB769430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE769430X 1952-10-01

Publications (1)

Publication Number Publication Date
GB769430A true GB769430A (en) 1957-03-06

Family

ID=3880140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26944/53A Expired GB769430A (en) 1952-10-01 1953-10-01 Improvements in couplings for lagging irons in mines

Country Status (4)

Country Link
BE (3) BE531878A (de)
DE (1) DE1102078B (de)
FR (1) FR1087566A (de)
GB (1) GB769430A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006076828A1 (fr) * 2005-01-21 2006-07-27 Zeyu Li Support de toit hydraulique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE535250A (de) * 1954-01-29
US5839690A (en) * 1990-06-11 1998-11-24 Blanchette; David John Inertial acceleration aircraft

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006076828A1 (fr) * 2005-01-21 2006-07-27 Zeyu Li Support de toit hydraulique

Also Published As

Publication number Publication date
BE514564A (de)
BE514563A (de)
BE531878A (de)
DE1102078B (de) 1961-03-16
FR1087566A (fr) 1955-02-25

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